[MacPorts] #59834: Boost: update to 1.76.0

[MacPorts]

#59834: Boost: update to 1.76.0
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  Reporter:  michaelld  |      Owner:  michaelld
      Type:  update     |     Status:  assigned
  Priority:  Normal     |  Milestone:
 Component:  ports      |    Version:
Resolution:             |   Keywords:
      Port:  boost      |
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Comment (by kencu):

 I don't relish the day I see coming where I might need four different
 boost versions installed to support different ports that may or may not be
 all compatible with the latest version, but haven't been moved along.

 As Michael says, an ideal solution does not present itself just yet.

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Ticket URL: <https://trac.macports.org/ticket/59834#comment:20>
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